The updated JS file for colorbox did not resolve the issue – it looks to be purely CSS related.
From what I can tell the conflict is with some of the -webkit properties in colorbox.css
I have created an updated CSS file that retains most of the original styling while allowing for videos to be properly displayed in Firefox(from my testing anyway). This shouldn’t be considered a permanent fix but if you would like to test it out please feel free to and be sure to update this topic with your findings.
Here’s what to do:
1.) Right-click and save-as the following file:
http://para.llel.us/support/wp-content/uploads/2011/10/colorbox.css
2.) Using your FTP program of choice, connect to your website(root of Wordpress install) and navigate to the following directory: /wp-content/themes/parallelus-salutation/assets/css
3.) Temporarily re-name the existing file ‘colorbox.css’ to ‘orig-colorbox.css’
4.) In the same directory, upload the new ‘colorbox.css’ that you downloaded in step 1.
If you have questions or need further assistance please let us know. I will work with Andy to implement a better/more permanent fix to include in the next theme update.